メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.5687500 33.3916667, 130.5750000 33.3916667, 130.5750000 33.3958334, 130.5687500 33.3958334, 130.5687500 33.3916667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral